<template>
  <div class="login_container">
    <!-- 登录的表单 -->
    <el-form class="login_form" :model="loginForm" :rules="rules" ref="loginForms">
      <h1>{{ setting.title }}</h1>
      <h2>模板框架,助力快速开发</h2>
      <el-form-item prop="username">
        <el-input :prefix-icon="User" placeholder="账号" v-model="loginForm.username"></el-input>
      </el-form-item>
      <el-form-item prop="password">
        <el-input type="password" :prefix-icon="Lock" placeholder="密码" v-model="loginForm.password"
                  show-password></el-input>
      </el-form-item>
      <!--  验证码模块 -->
      <el-form-item prop="checkcode" style="cursor:pointer;">
        <el-input placeholder="验证码" :prefix-icon="CircleCheck" v-model.trim="loginForm.checkcode"
                  @keyup.enter="login" style="width: 63%"></el-input>
        <div class="login-code">
          <img :src="checkCodeUrl" @click="getCode()"/>
        </div>
      </el-form-item>
      <!-- 记住密码模块 -->
      <el-checkbox v-model="rememberMe" style="margin:0px 0px 25px 0px;">记住密码</el-checkbox>
      <el-form-item>
        <el-button :loading="loading" class="login_btn" type="primary" size="default" @click="login">登录
        </el-button>
      </el-form-item>
    </el-form>
  </div>
</template>

<script setup>
//引入设置标题与logo这配置文件
import setting from '@/setting';
import {CircleCheck, Lock, User} from '@element-plus/icons-vue';
import {onMounted, ref} from 'vue';
import {useRouter} from 'vue-router';
import {ElNotification} from 'element-plus';
//引入获取当前时间的函数
import {getTime} from '@/utils/time';
//引入用户相关的小仓库
import useUserStore from "@/store/modules/user";
import {
  GET_PASSWORD,
  GET_REMEMBER,
  GET_USER,
  REMOVE_PASSWORD,
  REMOVE_REMEMBER,
  REMOVE_USER,
  SET_PASSWORD,
  SET_REMEMBER,
  SET_USER
} from "@/utils/token.ts";
import {checkCode} from "@/api/user";

let useStore = useUserStore();
//获取el-form组件
let loginForms = ref();
//获取路由器
let $router = useRouter();
//定义变量控制按钮加载效果
let loading = ref(false);
//收集账号与密码的数据
let loginForm = ref({username: 'admin', password: 'admin', checkcode: '', uuid: ''});
//记住我
let rememberMe = ref(false);
//验证码图片(存的是一个路径)
let checkCodeUrl = ref();

//登录按钮回调
const login = async () => {
  //保证全部表单相校验通过再发请求
  await loginForms.value.validate();
  //加载效果:开始加载
  loading.value = true;
  if (rememberMe.value) {
    SET_REMEMBER(String(rememberMe.value));
    SET_USER(loginForm.value.username)
    SET_PASSWORD(loginForm.value.username)
  } else {
    REMOVE_REMEMBER();
    REMOVE_USER();
    REMOVE_PASSWORD();
  }
  //点击登录按钮以后干什么?
  //通知仓库发登录请求
  //请求成功->首页展示数据的地方
  //请求失败->弹出登录失败信息
  try {
    //保证登录成功
    await useStore.userLogin(loginForm.value);
    //编程式导航跳转到展示数据首页

    /*//判断登录的时候,路由路径当中是否有query参数，如果有就往query参数挑战，没有跳转到首页
    let redirect: any = $route.query.redirect;
    $router.push({path: redirect || '/'});*/

    $router.push({path: '/'});
    //登录成功提示信息
    ElNotification({
      type: 'success',
      message: '欢迎回来',
      title: `HI,${getTime()}好`
    });
    //登录成功加载效果也消失
    loading.value = false;
  } catch (error) {
    //登录失败加载效果消息
    loading.value = false;
    //登录失败的提示信息
    ElNotification({
      type: 'error',
      message: error.message
    })
    getCode();
  }
}
//自定义校验规则函数
const validatorUserName = (rule, value, callback) => {
  //rule:即为校验规则对象
  //value:即为表单元素文本内容
  //函数:如果符合条件callBack放行通过即为
  //如果不符合条件callBack方法,注入错误提示信息
  try {
    if (value.length >= 5) {
      callback();
    } else {
      callback(new Error('账号长度至少五位'));
    }
  } catch {
    callback(new Error('请输入账号'));
  }
}

const validatorPassword = (rule, value, callback) => {
  try {
    if (value.length >= 5) {
      callback();
    } else {
      callback(new Error('密码长度至少五位'));
    }
  } catch {
    callback(new Error('请输入密码'));
  }
}

const validatorCheckCode = (rule, value, callback) => {
  if (value) {
    if (value.length != 4) {
      callback(new Error('验证码长度为四位'));
    } else {
      callback();
    }
  } else {
    callback(new Error('请输入验证码'));
  }
}

//定义表单校验需要配置对象
const rules = {
  //规则对象属性:
  //required,代表这个字段务必要校验的
  //min:文本长度至少多少位
  //max:文本长度最多多少位
  //message:错误的提示信息
  //trigger:触发校验表单的时机 change->文本发生变化触发校验,blur:失去焦点的时候触发校验规则
  username: [
    // { required: true, min: 6, max: 10, message: '账号长度至少六位', trigger: 'change' }
    {trigger: 'blur', validator: validatorUserName}
  ],
  password: [
    // { required: true, min: 5, max: 15, message: '密码长度至少5位', trigger: 'change' }
    {trigger: 'blur', validator: validatorPassword}
  ],
  checkcode: [
    //{ required: true, message: '请输入验证码', trigger: 'blur' }
    {trigger: 'blur', validator: validatorCheckCode}
  ]
}
//获取验证码
const getCode = async () => {
  //checkCodeUrl.value = EXPORT_API.CODE_URL + "?time=" + new Date().getTime();
  const result = await checkCode()
  if (result.code == 200) {
    checkCodeUrl.value = "data:image/gif;base64," + result.data.img
    loginForm.value.uuid = result.data.uuid
  }
}

onMounted(() => {
  const username = GET_USER();
  const password = GET_PASSWORD();
  const remember = GET_REMEMBER()
  //记住密码实现
  loginForm.value.username = username === null ? loginForm.value.username : username;
  loginForm.value.password = password === null ? loginForm.value.password : password;
  rememberMe.value = remember === null ? false : Boolean(rememberMe);
  //获取验证码
  getCode();
})
</script>
<style scoped lang="scss">

.login_container {
  width: 100%;
  height: 100vh;
  background: url('@/assets/images/login.png') no-repeat;
  background-size: cover;
  position: relative;

  .login_form {
    border-radius: 6px;
    width: 380px;
    padding: 25px 25px 5px 25px;
    background: url("@/assets/images/login_form.png") no-repeat;
    background-size: cover;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);

    h1 {
      font-size: 20px;
      margin: 0px auto 30px auto;
      text-align: center;
      color: #707070;
    }

    h2 {
      font-size: 15px;
      color: #707070;
      margin: 20px 0px;
    }

    .login_btn {
      width: 100%;
    }

    .login-code {
      width: 35%;
      height: 31px;
      float: right;
      margin-left: 5px;
    }
  }
}
</style>
